212478 has 16 divisors (see below), whose sum is σ = 485760. Its totient is φ = 60696.

The previous prime is 212467. The next prime is 212479. The reversal of 212478 is 874212.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212479) by changing a digit.

212478 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2488 + ... + 2571.

It is an arithmetic number, because the mean of its divisors is an integer number (30360).

2²¹²⁴⁷⁸ is an apocalyptic number.

212478 is an abundant number, since it is smaller than the sum of its proper divisors (273282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212478 is a wasteful number, since it uses less digits than its factorization.

212478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071.

The product of its digits is 896, while the sum is 24.

The square root of 212478 is about 460.9533598966. The cubic root of 212478 is about 59.6721001817.

The spelling of 212478 in words is "two hundred twelve thousand, four hundred seventy-eight".